[interfaces.worker]
  type: testharness
  [WorkerGlobalScope interface: attribute onlanguagechange]
    expected: FAIL
    bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1154779

  [WorkerGlobalScope interface: self must inherit property "onlanguagechange" with the proper type (4)]
    expected: FAIL
    bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1154779